Fan of Nintendo's handhelds and some of their first party titles on their home consoles but dislike their home console hardware since the Gamecube.
Fan of Sony's first party and find their home console hardware very comfortable. Heavily dislike their handhelds for various reasons.
Fan of Microsoft's hardware and especially their OS and the achievement system. Their first party is hit or miss with me.
In conclusion, I don't really consider myself a "fanboy" of any of the three because I game on all three platforms. I strongly believe they all have something to offer to the industry and hope to see them all succeed in 2015.